Reference: Liber pontificalis ecclesiae Ravennatis
Holder-Egger, O. (ed). _Agnelli qui et Andreas liber pontificalis ecclesiae Ravennatis_ in Waitz: _Scriptores rerum Langobardicarum et Italicarum saec. VI-IX_, p. 265–391. Hannover, 1878.
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Episode 28 — The early sources
The principal primary sources for the earliest period of Venice are not many, but their history is rather messy.